package chapter05.Example08;

public class Example08 {
    public static void main(String[] args) {
        System.out.println("1 添加----------");
        add();
        System.out.println("2 删除----------");
        remove();
        System.out.println("3 修改----------");
        alter();
    }
    public static void add() {
        StringBuffer sb = new StringBuffer();
        sb.append("itcast");
        System.out.println("append添加指定结果:"+sb);
        sb.insert(2, "123");
        System.out.println("insert添加结果"+sb);
    }
    public static void remove() {
        StringBuffer sb = new StringBuffer("itcastcn");
        sb.delete(1,5);
        System.out.println("删除指定位置结果:"+sb);
        sb.deleteCharAt(2);
        System.out.println("删除指定位置结果"+sb);
        sb.delete(0,sb.length());
        System.out.println("清空缓冲区结果:"+sb);
    }
    public static void alter() {
        StringBuffer sb = new StringBuffer("itcastcn");
        sb.setCharAt(1,'p');
        System.out.println("修改指定位置字符的结果:"+sb);
        sb.replace(1,3,"qq");
        System.out.println("替换指定位置字符串结果"+sb);
        System.out.println("字符串反转结果"+sb.reverse());
    }
}
